PERIODIC MAINTENANCE
8LV Series Operation Manual
47
2. Remove the two mounting screws (1, Figure 6)
and the housing (2, Figure 6).
3. Drain the fuel from the fuel drain cock on the
bottom of the fuel/water separator.
4. Disconnect the alarm switch harness.
Figure 7
5. Remove the alarm switch ((3, Figure 6) and
(Figure 7)) with a wrench.
6. Remove the filter element (4, Figure 6) with a
filter wrench.
7. Install the alarm switch to the new fuel filter.
8. Apply a thin film of clean diesel fuel to the
sealing surface of the new filter gasket.
9. Install new filter and hand-tighten. Use a filter
wrench and tighten to 14.7 - 19.6 N·m (130.1 -
173.5 in.-lb).
10. Connect the alarm switch harness.
11. Install the housing and mounting screws.
12. Bleed the fuel system.
See Bleeding the Fuel System on page 22.
Dispose of waste properly.
■ Changing the Engine Oil and Replacing
the Engine Oil Filter Element
See Changing the Engine Oil and Replacing the
Engine Oil Filter Element on page 43.
■ Checking and Replacing the Seawater
Pump Impeller
1. Loosen the side cover bolts and remove the
side cover.
2. Inspect the inside of the seawater pump with a
flashlight. If any of the following are found,
disassembly and maintenance are required:
• Impeller blades are cracked or nicked. Edges
or surfaces of the blades are marred or
scratched.
• Wear plate is damaged.
3. If no damage is found when inspecting the
inside of the pump, install the O-ring and side
cover.
4. If a large amount of water leaks continuously
from the water drain line below the seawater
pump during operation, replace the mechanical
seal. Contact your authorized Yanmar Marine
dealer or distributor.
Replacing the Seawater Pump Impeller
Note: The impeller must be replaced periodically
(every 1000 hours) even if there is no
damage.
Figure 8
Component Part No.
Fuel Filter Element 119798-55110
033658-00X
Rotation Direction
037418-00E00
8LV_OPM.book 47 ページ ２０１１年１月１１日 火曜日 午後１２時８分
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